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| Type |
Poster Presentation |
| Area |
Physical Chemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
PHYS.P-186 |
| Subject |
Stochastic Photon Emission of Nd3+-doped Upconversion Nanoparticles |
| Authors |
Eunsang Lee, Kang Taek Lee1,*
Department of Chemistry, Gwangju Institute of Science and Technology, Korea
1Division of Physical Chemistry Department of Chemi, Gwangju Institute of Science and Technology, Korea
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| Abstract |
Upconversion nanoparticles (UCNPs) have attracted great attention as one of prominent nanomaterials because of their unique optical properties. In particular, their specific photostability such as non-blinking and non-bleaching behaviors has contributed greatly to the field of bioimaging and biosensors. Previously, we observed stochastic photon emission (SPEM) in core/shell UCNPs (NaYF4:Yb3+,Er3+/NaYF4), ranging from nanosecond to microsecond time scales. To the contrary to power-laws kinetics of most quantum dots, the off-state distribution of UCNPs follows an exponential kinetics. There have been growing interest recently in Nd3+-doped UCNPs that is excited by 808 nm light, that penetrate deeper than that by 980 nm. We report SPEM in Nd3+-doped UCNPs for the first time. This luminescence intermittency is attributed to the long lifetime of intermediate states of the dopant lanthanide ions. |
| E-mail |
dmstkd1107@gist.ac.kr |
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121st General Meeting of the KCS